Philippe JEAN-PIERRE

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• Type de publi. : Article dans une revue
• Date de publi. : 01/01/2008
• Auteurs : Benjamin BoisL. WaldPhilippe PieriCornelis van LeeuwenL. CommagnacPh. CheryM. ChristenJean-Pierre J.-P. GaudillereEtienne Saur
• Organismes : Ecophysiologie et Génomique Fonctionnelle de la Vigne Centre Énergétique et Procédés Ecophysiologie et Génomique Fonctionnelle de la Vigne Ecophysiologie et Génomique Fonctionnelle de la Vigne École Nationale d'Ingénieurs des Travaux Agricoles - Bordeaux École Nationale d'Ingénieurs des Travaux Agricoles - Bordeaux École Nationale d'Ingénieurs des Travaux Agricoles - Bordeaux École Nationale d'Ingénieurs des Travaux Agricoles - Bordeaux Ecophysiologie et Génomique Fonctionnelle de la Vigne Transfert Sol-Plante et Cycle des Eléments Minéraux dans les Ecosystèmes Cultivés École Nationale d'Ingénieurs des Travaux Agricoles - Bordeaux
• Publié dans Journal International des Sciences de la Vigne et du Vin le 28/10/2020

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Résumé : Aims: This paper presents a study of spatial and temporal variations in solar radiation for the Bordeaux winegrowing region, over a 20 year period (1986-2005). Methods and results: Solar radiation data was retrieved from the HelioClim-1 database, elaborated from Meteosat satellite images, using the Hetiosat-2 algorithm. Daily data was interpolated using ordinary kriging to produce horizontal solar radiation maps at a 500 m resolution. Then using a digital elevation model, 50 m resolution daily solar radiation maps with terrain integration were produced for the period 2001-2005. The long term (20 year) analysis of solar radiation at low spatial resolution (500 rm showed a west to east decreasing gradient within the Bordeaux winegrowing region. Mean August-to-September daily irradiation values, on horizontal surface, were used to classify the Bordeaux winegrowing region into three zones: low, medium, and high solar radiation areas. This initial zoning was downscaled to 50 m resolution, applying a local correction ratio, based on 2001-2005 solar radiation from the inclined surface analysis. Grapevine development and maturation potential of the different zones of appellation of origin of Bordeaux winegrowing regions are discussed in relation with this zoning. Conclusion: Solar radiation variability within the Bordeaux winegrowing region is mainly governed by terrain slopes and orientations, which induce considerable variations within the eastern part of Bordeaux vineyards. Significance and impact of study: Solar radiation has a major impact on vineyard water balance, grapevine development and berry ripening. However, irradiation data is seldom available in weather stations records. This paper highlights the need for high resolution mapping of solarradiation that uses remote sensing and terrain effect integration for agroclimatic studies in viticulture.

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• Type de publi. : Article dans une revue
• Date de publi. : 01/01/2008
• Auteurs : Laurence DrouilhetAmélie PaillissonMartine BontouxEric JeanpierreS. MazerbourgPhilippe Monget
• Organismes : Physiologie de la reproduction et des comportements [Nouzilly] Physiologie de la reproduction et des comportements [Nouzilly] Physiologie de la reproduction et des comportements [Nouzilly] Physiologie de la reproduction et des comportements [Nouzilly] Université de Lorraine Physiologie de la reproduction et des comportements [Nouzilly]
• Publié dans Molecular Reproduction and Development le 31/10/2020

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Résumé : During folliculogenesis, oocytes accumulate maternal mRNAs in preparation for the first steps of early embryogenesis. The processing of oocyte mRNAs is ensured by heterogeneous nuclear ribonucleoproteins (hnRNPs) genes that encode RNA binding proteins implied in mRNA biogenesis, translation, alternative splicing, nuclear exportation, and degradation. In the present work, by combining phylogenetic analyses and, when available, in silico expression data, we have identified three new oocyte-expressed genes encoding RNA binding proteins by using two strategies. Firstly, we have identified mouse orthologs of the Car1 gene, known to be involved in regulation of germ cell apoptosis in C. elegans, and of the Squid gene, required for the establishment of anteroposterior polarity in the Drosophila oocyte. Secondly, we have identified, among genes whose ESTs are highly represented in oocyte libraries, a paralog of Poly(A) binding protein-Interacting Protein 2 (Paip2) gene, known to inhibit the interaction of the Poly(A)-Binding Protein with Poly(A) tails of mRNAs. For all of these genes, the expression in oocyte was verified by in situ hybridization. Overall, this work underlines the efficiency of in silico methodologies to identify new genes involved in biological processes such as oogenesis. Mol. Reprod. Dev. 75: 1691-1700, 2008. (c) 2008 Wiley-Liss, Inc.

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• Type de publi. : Article dans une revue
• Date de publi. : 01/01/2008
• Auteurs : Stéphanie Coyral-CastelLucie ToscaGuillaume FerreiraEric JeanpierreChristelle RameDidier LometAlain CaratyPhilippe MongetChristine ChabrolleJoëlle Dupont
• Organismes : Physiologie de la reproduction et des comportements [Nouzilly] Physiologie de la reproduction et des comportements [Nouzilly] Physiologie de la reproduction et des comportements [Nouzilly] Physiologie de la reproduction et des comportements [Nouzilly] Physiologie de la reproduction et des comportements [Nouzilly] Physiologie de la reproduction et des comportements [Nouzilly] Physiologie de la reproduction et des comportements [Nouzilly] Physiologie de la reproduction et des comportements [Nouzilly] Physiologie de la reproduction et des comportements [Nouzilly] Physiologie de la reproduction et des comportements [Nouzilly]
• Publié dans Journal of Neuroendocrinology le 25/10/2020

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Résumé : Hypothalamic AMP-activated kinase (AMPK) is a key regulator of food intake in mammals. Its role in reproduction at the central level and, more precisely, in gonadotrophin-releasing hormone (GnRH) release has never been investigated. We showed that each subunit of AMPK is present in immortalised GnRH neurones (GT1-7 cells). Treatment with 5-aminoimidazole-4-carboxamide-1-beta-D-ribonucleoside (AICAR) and metformin, two activators of AMPK, increased dose-dependent and time-dependent phosphorylation of AMPK alpha atThr172 in GT1-7 cells. Phosphorylation of acetyl-coenzyme A carboxylase at ser79 also increased. Treatment with AICAR (5 mM) or metformin (5 mM) for 4 h inhibited GnRH release in the presence or absence of GnRH (10(-8) M). Specific AMPK inhibitor compound C completely eliminated the effects of AICAR or metformin on GnRH release. Finally, we determined the central effects of AICAR in vivo on food intake and oestrous cyclicity. Ten-week-old female rats received a 50 mu g AICAR or a saline i.c.v. injection. We detected increased AMPK and acetyl-CoA carboxylase phosphorylation, specifically in the hypothalamus, 30 min after AICAR injection. Food intake was significantly higher (P < 0.05) in animals treated with AICAR than in animals injected with saline, 24 h after injection. This effect was abolished after 1 week. Moreover, during the 4 weeks following injection, the interval between two oestrous stages was significantly lower in the AICAR group than in the saline group. Our findings suggest that AMPK activation may act directly at the hypothalamic level to affect fertility by modulating GnRH release and oestrous cyclicity.

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• Type de publi. : Article dans une revue
• Date de publi. : 01/01/2008
• Auteurs : Jean-Philippe GervaisOlivier BonroySteve Couture
• Organismes : North Carolina State University [Raleigh] Laboratoire d'Economie Appliquée = Grenoble Applied Economics Laboratory Université Laval [Québec]
• Publié dans Agribusiness le 27/10/2020

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Résumé : Cost functions of three Canadian food processing sectors (meat, bakery and dairy) are estimated using provincial data. A translog functional form is used and the concavity property of the cost function is imposed locally. The Morishima substitution elasticities and scale elasticities are computed for different provinces. Inference is carried out using asymptotic theory as well as bootstrap methods. The evidence suggests that there are significant substitution possibilities between the agricultural input and other production factors in the meat and bakerysectors. Scale elasticities suggest that increasing returns to scale are present in bakery and meat industries. To account for supply management in the dairy sector, separability between raw milk and other inputs was introduced. There exists evidence of increasing returns to scale at the industry level in the small producing provinces, but decreasing returns to scale in the two largest dairy provinces (Ontario and Quebec).

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• Type de publi. : Article dans une revue
• Date de publi. : 01/01/2008
• Auteurs : Armel Thongo M'BouChristophe JourdanPhilippe DeleporteYann NouvellonLaurent Saint‐andréJean-Pierre BouilletFidèle MialoundamaAndré MabialaDaniel Epron
• Organismes :
• Publié dans Annals of Forest Science le 26/10/2020

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Fichiers liés : hal-00883431.pdf

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• Type de publi. : Article dans une revue
• Date de publi. : 01/01/2008
• Auteurs : Falk BernsmannLudovic RichertBernard SengerPhilippe LavalleJean-Claude VoegelPierre SchaafVincent Ball
• Organismes : Biomatériaux : Processus biophysiques et biologiques aux interfaces Biomatériaux : Processus biophysiques et biologiques aux interfaces Biomatériaux : Processus biophysiques et biologiques aux interfaces Biomatériaux : Processus biophysiques et biologiques aux interfaces Université Louis Pasteur - Strasbourg I Biomatériaux : Processus biophysiques et biologiques aux interfaces Institut Charles Sadron Biomatériaux : Processus biophysiques et biologiques aux interfaces
• Publié dans Soft Matter le 31/10/2020

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Résumé : In this communication, we demonstrate that dopamine is able to undergo a polymerisation process in (PLL-HA)n polyelectrolyte multilayer films, and that this polymerisation is of the same nature as in solution at pH 8.5. This polymerisation changes the chemical composition and decreases the mobility of the PLL chains in the film, and ultimately allows the easy detachment of the film as free-standing membranes with 0.1 M HCl solutions.

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Fichiers liés : Bernsmann2008.pdf

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• Type de publi. : Communication dans un congrès
• Date de publi. : 01/01/2008
• Auteurs : Nicolas RasamimananaFabrice GuédyNorbert SchnellJean-Philippe LambertFrédéric Bevilacqua
• Organismes : Equipe Interactions musicales temps-réel Equipe Interactions musicales temps-réel Equipe Interactions musicales temps-réel Equipe Interactions musicales temps-réel Equipe Interactions musicales temps-réel

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Résumé : Three Pedagogical Scenarios using the Sound and Gesture Lab

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• Type de publi. :
• Date de publi. : 01/01/2008
• Auteurs : Jean-Yves DourmadBernard FostierBénédicte LebretPhilippe LecouveyJean NobletYvon SalaünPierre Sellier
• Organismes : Systèmes d'élevage, nutrition animale et humaine Institut du Porc Systèmes d'élevage, nutrition animale et humaine Institut du Porc Systèmes d'élevage, nutrition animale et humaine Institut du Porc Génétique Animale et Biologie Intégrative

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Résumé : absent

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• Type de publi. : Ouvrage (y compris édition critique et traduction)
• Date de publi. : 01/01/2008
• Auteurs : Philippe BourdeauJean-Pierre AugustinLoïc Ravenel
• Organismes : Pacte, Laboratoire de sciences sociales

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Résumé : L'empreinte du sport dans l'espace géographique, son rôle économique, la place qu'il tient dans l'organisation des sociétés et les représentations qu'elles se font d'elles-mêmes contrastent avec la relative faiblesse des études qui lui sont consacrées. Les sciences humaines et sociales ont pris quelques retards à analyser ces émergences sportives, même si les apports des recherches en histoire, économie et sociologie sont aujourd'hui manifestes. Dans ce jeu, la géographie et l'aménagement prennent une large part dans la mesure où leurs approches rappelant que les pratiques sportives ne s'expliquent pas seulement par des processus et des coûts, mais aussi par leur inscription dans des lieux et des territoires. C'est dans cette perspective qu'une géographie des sports en France s'impose, afin de mettre en recherche et en mouvement les territoires des pratiques sportives. De même, à l'ère des cultures monde véhiculées par les médias et les firmes multinationales, il est utile d'approfondir la connaissance des cultures sportives en France où se réorganisent des pratiques identitaires particulières et où se développent d'autres usages ludiques qui offrent des formes de territorialisation susceptibles de résister aux effets uniformisants de la mondialisation.

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• Type de publi. : Article dans une revue
• Date de publi. : 01/01/2008
• Auteurs : Jean-Christophe CornilyPierre-Yves PennecPhilippe CastellantEric BezonGrégoire Le GalMartine GilardYannick JobicJacques BoschatJean-Jacques Blanc
• Organismes : Département de Cardiologie Département de Cardiologie Département de Cardiologie Optimisation des régulations physiologiques Clinique d'Investigation Clinique Optimisation des régulations physiologiques Service d'Hémodynamique Département de Cardiologie Optimisation des régulations physiologiques Département de Cardiologie
• Publié dans Cardiology le 29/10/2020

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Résumé : OBJECTIVES: Cardiac tamponade represents a life-threatening condition that may complicate almost any cause of pericarditis. We conducted a 10-year prospective survey on patients with cardiac tamponade requiring an emergency drainage. METHODS: From 1996 to 2005, 114 consecutive patients were admitted to the University Hospital of Brest for medical cardiac tamponade. Data on medical history, and volume, characteristics and histology of the pericardial fluid as well as short- and long-term follow-up data were collected. RESULTS: Malignant disease was the primary cause of medical tamponade (74 patients; 65%), followed by viral history (11; 10%) and intra-pericardial bleeding due to anti-coagulation treatment (4; 3%). In 12 cases, aetiology remained unknown (10%). Pericardiocentesis was immediately performed in 80 cases and surgical pericardiotomy in 34. The mean volume drained was 593 +/- 313 ml. In-hospital mortality was 10% without any difference between malignant and non-malignant diseases (p = 0.8). One-year mortality was 76.5% in patients with malignant disease and 13.3% in those without malignant disease (p < 0.0001). Median survival in case of malignant disease was 150 days. CONCLUSION: Compared to previously published data, our survey shows a decrease in some historical causes of tamponade such as tuberculosis, myxoedema or uraemia. The leading cause is currently malignant disease, which carries a very poor prognosis.

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